FIELD: chemical-pharmaceutical industry, medicinal plants. SUBSTANCE: viburnum (Viburnum) waste processing extract from kernels and/or husks and/or oil cake contains complex of oligomeric procyanidines that is prepared by extraction of viburnum kernels and/or husks and/or oil cake with water or an aqueous-ethanol mixture with alcohol content 70 wt.-%, not above. Invention can be used in chemical, biological or chemical- pharmaceutical industry for preparing complex of oligomeric procyanidines eliciting high antiradical activity. Invention provides expanding assortment of vegetable extracts comprising complex of oligomeric procyanidines and eliciting the enhanced antiradical activity. EFFECT: improved preparing method, valuable biological properties of extract. 1 tbl
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